Transmittance photoplethysmography and pulse oximetry with near infrared laser diodes

Abstract

Photoplethysmography and pulse oximetry are widely used techniques for noninvasive monitoring of heart rate and peripheral oxygen saturation. In recent years we have been working on the application of near infrared range wavelengths to replace those of the classical pulse oximeters. The development of laser diodes based sensors, processing algorithms, a calibration procedure, and the comparison with a commercial pulse oximeter, have been followed by a set of experimental studies. The results presented here demonstrate the feasibility of transmittance photoplethysmography for pulse oximetry in both peripheral and non-peripheral beds under different conditions.

Wavelength selection method based on test analysis of variance: application to oximetry

“…Silva 11 et al presented a transmittance pulse oximetry system based on nearinfrared (NIR) laser diodes (750 and 850 nm) for monitoring a wide range of oxygen saturation levels of arterial blood hemoglobin. Lopez-Silva 12 et al have been working on the application of near infrared range wavelengths to replace those of the classical pulse oximeter with the development of laser diodes based sensors, processing algorithms, and a calibration procedure. Meanwhile, the relevant researchers have discussed a series of methods which is used to select the wavelengths of the visible-near infrared spectral window for the measurements of various components in blood.…”